UIBlurEffect毛玻璃效果

UIBlurEffect最早出现于iOS 8，到了iOS 10，又增加了两个枚举值，看下效果:

代码如下：

/*
 typedef NS_ENUM(NSInteger, UIBlurEffectStyle) {
     UIBlurEffectStyleExtraLight,
     UIBlurEffectStyleLight,
     UIBlurEffectStyleDark,
     UIBlurEffectStyleExtraDark __TVOS_AVAILABLE(10_0) __IOS_PROHIBITED __WATCHOS_PROHIBITED,
     UIBlurEffectStyleRegular NS_ENUM_AVAILABLE_IOS(10_0), // Adapts to user interface style
     UIBlurEffectStyleProminent NS_ENUM_AVAILABLE_IOS(10_0), // Adapts to user interface style
 } NS_ENUM_AVAILABLE_IOS(8_0);
 */
 
UIImageView *imgView = [[UIImageView alloc] initWithFrame:self.view.bounds];
imgView.image = [UIImage imageNamed:@"1.jpg"];
[self.view addSubview:imgView];
    
// 毛玻璃
UIBlurEffect *blur1 = [UIBlurEffect effectWithStyle:UIBlurEffectStyleExtraLight];
UIBlurEffect *blur2 = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
UIBlurEffect *blur3 = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIBlurEffect *blur4 = [UIBlurEffect effectWithStyle:UIBlurEffectStyleRegular];
UIBlurEffect *blur5 = [UIBlurEffect effectWithStyle:UIBlurEffectStyleProminent];
    
NSArray *arr = @[blur1, blur2, blur3, blur4, blur5];
   
CGFloat x = 50;
__block CGFloat y = 100;
CGFloat w = self.view.bounds.size.width-100;
CGFloat h = 50;
    
[arr enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
   
   UIVisualEffectView *effe = [[UIVisualEffectView alloc] initWithFrame:CGRectMake(x, y, w, h)];
   effe.effect = obj;
   [self.view addSubview:effe];
   
   y += h + 10;
   
}];

效果图如下：